CYCLUS TOOLS seat tube reamer set: tool holder + extension + 5 reamer of your choice | 729994
Seat tube reaming | Retrobike
Adjustable Seat Tube Reamer: 25.4mm to 28.575mm (1" to 1 1/8") - Chadwick & Trefethen #28, 00280 Carbon Shell Angle Blades - Made in USA - Bike Recyclery